.header {
        width: 20%;
        background-color: #ff5722;
        color: #ffffff;
        >ul {
            width: 100%;
            @include clearfix;
            >li {
                width: 100%;
                border: 1px solid #ffffff;
                cursor: pointer; // float: left;
                color: 20px;
                text-align: center;
                line-height: 60px;
                &:hover {
                    background-color: #ff9800;
                }
                >ul {
                    width: 100%;
                    background: red;
                    li{
                        &:hover{
                            background: #c31111;
                        }
                    }
                }
            }
            .active {
                background-color: #ff9800;
            }
        }
    }